[en] In this thesis several aspects of beyond SM physics schemes have been treated. In particular, two categories of models have been considered: ($i$) models with extra
Higgs ElectroWeak (EW) doublets (multi-Higgs-doublet models), ($ii$) models with new fermion EW singlets (type-I seesawmodels). In the first category, two problems
associated with the most general two-Higgs-Doublet Model (2HDM) and
with the three-Higgs-Doublet Model (3HDM) have been tackled. In the
former case the scalar mass spectrum has been derived in a
basis-invariant fashion whereas in the later, after introducing a
general procedure for the minimization of highly symmetric potentials,
the minimization of an $S_4$ and of an $A_4$ 3HDM has been
analyzed. In the second category, the possibility of envisaging
seesaw-like models yielding sizeable lepton-flavor-violating decay
rates has been investigated. With the models at hand, the
corresponding charged lepton-flavor-violating phenomenology has been
studied focusing on rare muon decays, for which forthcoming
lepton-flavor-violating experiments will be able to prove large parts
of their parameter space.
Research Center/Unit :
Interactions Fondamentales en Physique et Astrophysique (IFPA)
Disciplines :
Space science, astronomy & astrophysics
Author, co-author :
Degée, Audrey ; Université de Liège - ULiège > Département d'astrophys., géophysique et océanographie (AGO) > Physique des astroparticules
Language :
English
Title :
Scalar and fermionic extensions of the Standard Model
Defense date :
08 October 2013
Number of pages :
VIII,127
Institution :
ULiège - Université de Liège
Degree :
Ph.D. in Physics
Promotor :
Cudell, Jean-René ; Université de Liège - ULiège > Unités de recherche interfacultaires > Space sciences, Technologies and Astrophysics Research (STAR)
President :
Magain, Pierre ; Université de Liège - ULiège > Unités de recherche interfacultaires > Space sciences, Technologies and Astrophysics Research (STAR)
Secretary :
Ivanov, Igor ; Université de Liège - ULiège > Département d'astrophysique, géophysique et océanographie (AGO) > Interactions fondamentales en physique et astrophysique (IFPA)
Jury member :
Aristizabal Sierra, Diego ; Université de Liège - ULiège > Département d'astrophysique, géophysique et océanographie (AGO) > Interactions fondamentales en physique et astrophysique (IFPA)
Hambye, Thomas
Nardi, Enrico
Name of the research project :
Scalar and fermionic extensions of the Standard Model